encodingfilter.java

一个java写的网上购物系统

package com.hb.myshop.tools;

import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;

public class EncodingFilter implements Filter{
	private String targetEncoding = "UTF-8";;
	protected FilterConfig filterConfig=null;
    //由Web容器调用，初始化此Filter
	public void init(FilterConfig config) throws ServletException {
		this.filterConfig=config;
		this.targetEncoding=config.getInitParameter("encoding");
	}
    //过滤处理方法
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		//对请求进行编码设置
		HttpServletRequest srequest = (HttpServletRequest)request;
		srequest.setCharacterEncoding(targetEncoding);
		//将处理权转交给下一个处理器
		chain.doFilter(request, response);
	}
	//由Web容器调用，销毁此Filter
	public void destroy() {
		this.targetEncoding=null;
		this.filterConfig=null;
	}
	public void setFilterConfig(final FilterConfig filterConfig){
		this.filterConfig=filterConfig;
	}

}